smjn commented on code in PR #18174:
URL: https://github.com/apache/kafka/pull/18174#discussion_r1887252720
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share-coordinator/src/main/java/org/apache/kafka/coordinator/share/metrics/ShareCoordinatorMetrics.java:
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@@ -153,4 +158,31 @@ public void record(String sensorName) {
globalSensors.get(sensorName).record();
}
}
+
+ public void recordPrune(double value, TopicPartition tp) {
+ pruneMetrics.computeIfAbsent(tp, k -> new ShareGroupPruneMetrics(tp))
+ .pruneSensor.record(value);
+ }
+
+ private class ShareGroupPruneMetrics {
+ private final Sensor pruneSensor;
+
+ ShareGroupPruneMetrics(TopicPartition tp) {
+ String sensorNameSuffix = tp.toString();
+ Map<String, String> tags = Map.of(
+ "topic", tp.topic(),
+ "partition", Integer.toString(tp.partition())
+ );
+
+ pruneSensor =
metrics.sensor(SHARE_COORDINATOR_STATE_TOPIC_PRUNE_SENSOR_NAME +
sensorNameSuffix);
+
+ pruneSensor.add(
+ metrics.metricName("last-pruned-offset",
Review Comment:
The serves as proof of the record pruner working from the monitoring
perspective. On the off chance that we suspect that the pruner has deleted
overwhelming amount of data - this could prove useful data. This is capturing
the value of the offset for which the delete call was successful.
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